Lupranat MR 4,4'-Diphenylmethane diisocyanate BASF-Elastogran PU - Isocyanates >> MDI, diphenylmethane diisocyanate ADHESIVE Lupranat MR is 4,4'-diphenylmethane diisocyanates (MDI) with high acidity. Lupranat MR is used for the manufacture of prepolymers. They are also used for the production of adhesives. Diphenylmethane-4,4'-diisocyanate (MDI) with high acidity. Used for the manufacture of prepolymers and adhesives.